I don't see how one invalidates the other. Amazon's predatory practices have killed off the competition and created a sizable price gap. Not everyone has the luxury of voting with their money.
When I click on the link you provided, I see my post.
When I go on the !AI@lemmy.ml page on lemmy.ca, I don't see it. On any device of my devices (browser and app). I tried to sort by new and I still don't see it. Does it need a moderator's acceptance or something?
I don't see anymars wrong with it